Primary heat exchanger for heating device of building heating system, has heat exchanger chamber that surrounds combustion chamber of burner circularly, limits flow path for combustion gases and is circularly passed-through by gases

摘要

The exchanger has a heat exchanger chamber (72) subjected with combustion gases from a burner and a water chamber subjected with heating water. The chamber (72) surrounds a combustion chamber (56) of the burner circularly and is circularly passed-through by the combustion gases. The chamber (72) limits a flow path for the gases, where the path is guided over a circumferential angle of more than 270 degrees.